Submission #1057436

#	Time	Username	Problem	Language	Result	Execution time	Memory
1057436		Trent	Mutating DNA (IOI21_dna)	C++17	71 / 100	1574 ms	4176 KiB

dna

#include "dna.h"
#include "bits/stdc++.h"
using namespace std;
#define forR(i, x) for(int i = 0; i < (x); ++i)
#define REP(i, a, b) for(int i = (a); i < (b); ++i)
typedef long long ll;
typedef vector<int> vi;

string a, b;

void init(std::string a, std::string b) {
	::a = a;
	::b = b;
}

int id(char v) {
	return v == 'A' ? 0 : v == 'C' ? 1 : 2;
}
int get_distance(int x, int y) {
	vector<vi> cnt(3, vi(3, 0));
	REP(i, x, y+1) {
		cnt[id(a[i])][id(b[i])]++;
	}
	int ab=min(cnt[0][1], cnt[1][0]), ac=min(cnt[0][2], cnt[2][0]), bc=min(cnt[1][2], cnt[2][1]);
	cnt[0][1]-=ab, cnt[1][0]-=ab;
	cnt[0][2]-=ac, cnt[2][0]-=ac;
	cnt[1][2]-=bc, cnt[2][1]-=bc;
	int ret = -1;
	if(cnt[0][1] == cnt[2][0] && cnt[2][0] == cnt[1][2] && cnt[1][0] + cnt[2][1] + cnt[0][2] == 0) ret = ab + ac + bc + 2 * cnt[0][1];
	else if(cnt[1][0] == cnt[2][1] && cnt[2][1] == cnt[0][2] && cnt[0][1] + cnt[2][0] + cnt[1][2] == 0) ret = ab + ac + bc + 2 * cnt[1][0];

	if(y - x <= 2) {
		int real = -1;
		string as=::a.substr(x, y-x+1), bs=::b.substr(x, y-x+1);
		if(as == bs) real = 0;
		forR(i, as.size()) forR(j, as.size()) {
			swap(as[i], as[j]);
			if(as == bs) real = real == -1 ? 1 : min(real, 1);
			forR(k, as.size()) forR(l, as.size()) {
				swap(as[k], as[l]);
				if(as == bs) real = real == -1 ? 2 : min(real, 2);
				swap(as[k], as[l]);
			}
			swap(as[i], as[j]);
		}
		if(ret != real) {
			cerr << x << ' ' << y << ' ' << ret << ' ' << real << '\n';
			throw;
		}
	}
	return ret;
}

Compilation message (stderr)

dna.cpp: In function 'int get_distance(int, int)':
dna.cpp:4:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    4 | #define forR(i, x) for(int i = 0; i < (x); ++i)
      |                                     ^
dna.cpp:36:3: note: in expansion of macro 'forR'
   36 |   forR(i, as.size()) forR(j, as.size()) {
      |   ^~~~
dna.cpp:4:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    4 | #define forR(i, x) for(int i = 0; i < (x); ++i)
      |                                     ^
dna.cpp:36:22: note: in expansion of macro 'forR'
   36 |   forR(i, as.size()) forR(j, as.size()) {
      |                      ^~~~
dna.cpp:4:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    4 | #define forR(i, x) for(int i = 0; i < (x); ++i)
      |                                     ^
dna.cpp:39:4: note: in expansion of macro 'forR'
   39 |    forR(k, as.size()) forR(l, as.size()) {
      |    ^~~~
dna.cpp:4:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    4 | #define forR(i, x) for(int i = 0; i < (x); ++i)
      |                                     ^
dna.cpp:39:23: note: in expansion of macro 'forR'
   39 |    forR(k, as.size()) forR(l, as.size()) {
      |                       ^~~~

• Subtask 1: 21 / 21
• Subtask 2: 22 / 22
• Subtask 3: 0 / 13
• Subtask 4: 28 / 28
• Subtask 5: 0 / 16